As a designer, I can run unmoderated user research tests using real production data inside of the test wikis.
To investigate after confirmation from Performance team
We've decided that we can go ahead with enabling on testwiki even before T303618.
Change 775012 had a related patch set uploaded (by Samwilson; author: Samwilson):
[operations/mediawiki-config@master] Enable Realtime Preview on testwiki
Change 775012 merged by jenkins-bot:
Mentioned in SAL (#wikimedia-operations) [2022-03-30T07:08:06Z] <taavi@deploy1002> Synchronized wmf-config/InitialiseSettings.php: Config: [[gerrit:775012|Enable Realtime Preview on testwiki (T302506)]] (duration: 00m 56s)
I don't think this needs QA. The feature is definitely deployed to Test Wikipedia :)